Half to lewis c



(No Model.)

N. H. DAVIS.

CAR SPRING.

No. 364,492. Patented June 7.1887.

`UNITED g STATESA PATENT OFFICE.

NATHAN H. DAVIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ON E" HALF TO LEWIS C. GRATZ, OF SAME PLACE.

CAR-SPRING.

SPECIPCATION forming part of Letters Patent No. 364.492, dated June7f1887.

(No model.)

To all whom it 77mg concern: Y

Be it known that I, NATHAN H. Davis, a citizen of the United States, residingin the city and county of Philadelphia,State of Pennsylvania, have invented a new and useful Improvement in CarSprings, which' improvement is fully set forth in the following specification and accompanying drawings, in whicl1- Figure l represents a top or plan View of rc the car-spring embodying my invention. Fig.

2 represents the central vertical section thereof.

Similar letters of reference indicate corre spending parts in the two figures.

My invention consists of' a car-spring formed r 5 of spring-plates constructed of wrought metal, having openings with inwardly -projeeting flanges around said openings, springs which are interposed between the plates and fitted to said flanges, and a cup which is connected with one of the springplates by means of a bolt, whereby a strong, durable, and inexpensive spring is produced, as will beherein- `after more fully set forth.

Referring to the drawings, A represents upper and lower spring-plates and B represents the springs which are fitted between said plates. In each plateI is a series of openings,

l, the walls of which have inwardly-projecting flanges D, which enter the ends of the springs B, whereby displacement of the springs from said plates is'prevented. In the center of one of the plates, A, is an openingin which is titted a socket or cup, E, the base of which is perforated for the passage of the bolt F, which also passes through the opening in the other plate, and has its head bearing against said plate and occupying the recess G therein. The threaded end of the bolt projects intofhe cup E andcarries the nut G, which, as will be seen, occupies the cup E.

The plates A are formed of wrought metal,

and the flanges D are produced by squeezing,

punching, pressing, or otherwise working the metal, said flanges serving to strengthen the walls of the openings O, and consequently the plates themselves, whereby the plates are strong and durable, and .as they may be made of comparatively light metal the weight and expense of the car-spring are reduced, the employment of such metal in the manufacture of 5 u springplates A avoiding the delay incident to the formation of such plates of malleable iron owing to the long time necessarily required in the formation of cast metallic plates and the conversion of the same into malleable iron.

I am aware that it is not new to make spring-plates of wrought metal having depressions therein; but in my invention the spring plates are priinaril y punched to form the open- 6.3 ings O, and said openings are then flanged, whereby their wallsand,consequently, the corners of the plates are greatly Stifened without adding to the weight of the plates, while the plates are of reduced weight, owing to the openings C. The springplates, with their openings and flanges, form the subject-matter of an application for LettersPatcnt, Serial No. 228,707, filed by me of even date herewith.

Having thus described my invention, what 7o I claim as new, and desire to secure by Letters Patent. is

A car-spring consisting of the springs B, the top and bottom plates A, the socket E, the bolt F, and the nut G, said plates being formed of wrought metal, with openings C, having flanges D around the walls thereof, said parts being combined and operating substantially as described.

NATHAN n. Davis. y

lVitnesses:

J oHN A. WIEDERsHErM, JAS. F. KELLEY. 

